Internal-combustion engine.



A. F. VON sunwupl. INTERNAL COMBUSTION ENGINE.

APPLICATION FILED JAN 8, 1912.

1,075,603, Patented 0m. 14x 191:1

jg Z. 0 2.,

ARNOLD FREIHERR VON SCHMIDT, OF MUNICH, GERMANY, ASSIGNOR '10 BUSCH- SULZER BROS.-IDIESEL ENGINE COMPANY, OF S'l. LOUIS, MISSOURI, A CORPORA- TION OF MISSOURI. 1

INTERNAL-COMBUSTION ENGINE.

- Specification of Letters Patent.

Patented Oct. 14, redia To all whom it may concern:

' Be it known that I, ARNOLD FREIHERR VON SCHMIDT, a subject of the Emperor of Germany, residing in Munich, Germany, have invented a certain new and useful Improvement in Internal-Combustion Engines, of which the following is a specification.

This invention relates to an arrangement in two stroke cycle engines of admisslon ports for the scavenging charge, in such a way that at least one pair of these ports, which are opposite'to each other, have such a direction, that their scavenging current flows along the cylinder walls, while the other admission ports are so directed that their air current chiefly scavenges the central part of the cylinder.

An embodiment of my invention is shown in Figures 1, 2, 3 wherein- Fi 1 represents a vertical section through X X of Fig. 3. Fig. 2 represents a vertical section through Y Y of Fig. 3. Fig. 3 is a cross-section through the working cylinder, taken through the inlet and outlet ports.

In all these figures the letters I) and d represent the inlet ports for the scavenging charge or the fresh air, the letters 0 0 represent the outlet ports for the waste gases.

The two admission ports I) b Fig.3, which are opposite to each other, are directed in a more or less tangential direction to the cylinder walls. By this arrangement the scavenging currents entering through these ports flow upward along the cylinder wall on the admission side of the cylinder in two separate currents or in one united resulting current, as shown by the arrows f f. These currents scavenge the angle e (Figs. 1, 2) lying on the admission side near the cylinder.

cover, driving out, the waste gases through the exhaust ports 0. Therefore these air currents f have chiefly the task to scavenge the exhaust gases staying on the admission side along the cylinder walls and cylinder cover. The other part of the waste gases staying more toward the center of the cylinder is driven out in the direction of the arrow 9 (Figs. 1, 2, 3) by the scavenging currents coming from the admission ports d and directed toward the upper end of the cylinder. rected, that they enter below the currents flowing along the cylinder walls and cut them the least possible so, that each current retains its prescribed direction. In this manner not only a thorough scavenging of the cylinder from exhaust gases is obtained, but according to the good. utilization of each individual current-much scavenging air can be saved.

Instead of one pair of ports I) with ap proximately tangential direction several pairs can be arranged according to the di-. mensions of the cylinder; instead of two ports, 0! one or three or more can be established also according to the dimensions or the form of the cylinder.

These air currents g are so di- Having thus described the nature of the a said invention and the best means I- know of carrying the same into practical effect, I c a1m:

1. An internal combustion engine having a cylinder provided with a pair of oppositely located admission ports extending in a direction to cause scavenging currents to flow upwardly along the cylinder walls, and also having other admission ports which direct scavenging currents toward the center of the cylinder. 2. In an internal combustion engine, a cyl-. 1nder having a tangentially arranged admission port which acts to direct a scavengmg current along the cylinder walls, and another admission port which directs a scavengmg current toward the central portion of the cylinder. I

3. In an internal combustion engine, a cyl- 1nder having opposite tangentially arranged admission ports which direct scavenging currents along the cylinder walls, and other admisslon ports which direct scavenging currents toward the central portion of the cylinder.

4. In an internal combustion engine, a cyl- 1nder having opposite tangentially arranged admission ports which direct scavenging In testimony whereof I have signed my currents along the cylinder walls, and other name to this specification in the presence of admission ports which direct scavenging two subscribing witnesses.

currents toward the central portion of the ARNOLD RE ERR N SCHMIDT. cylinder, the last named ports lying between Witnesses: the first named ports and opposite the ex- A. V. W. COTTER,

haust ports of the cylinder. RIoHAm) LEMP. 

